concurrently fopen() file to read

[enterume]

Hi,

Will there be any problem is a file being open and concurrently read by a lots of users? Just 'r' .

Thanks
Louis

[mikesgt2]

It would be a good idea to lock the file. This is essential for writing but advisable for reading. Use code like this:

<?php
$fp = fopen('file.txt', 'r');
  if($fp) {
      if(flock($fp, LOCK_SH)) {
        $read = fread($fp, 1024);
        flock($fp, LOCK_UN);
      }
    fclose($fp);
  }
?>

Check out the manual here:
http://www.php.net/manual/en/function.flock.php

[enterume]

Hi,

What I going to do is, create a file which only for user to read the data. So from what you said, it will be no matter how many user read the file concurrently?

Thanks
Louis